Dullness in the middle of the day may be caused by autonomic dysfunction, or by angina pectoris, bronchial asthma and other diseases, which need to be treated according to the cause.
1. Autonomic dysfunction: parasympathetic disorder, release of cholinergic transmitters, airway smooth muscle spasm, lower oxygen content, resulting in heart tightness, can be treated with oral metoprolol.
2. Angina: the main symptom of angina is boring pain, squeezing pain or tightness in the back of the sternum and throat, angina is related to myocardial ischemia. Angina attack should immediately rest, and sublingual nitroglycerin, if the symptoms can not be relieved to consult a doctor.
3. Bronchial asthma: the main symptoms of asthma and chest tightness, bronchial asthma and airway smooth muscle spasm, if suspected of bronchial asthma, you need to go to the hospital for a bronchodilator test, if the bronchodilator test is positive, the diagnosis can be clear. Bronchial asthma attacks can be treated with glucocorticoids such as methylprednisolone and bronchodilators such as salbutamol.
If you feel tightness in the middle of the day, you need to go to the hospital to avoid delaying your condition.